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Ellingson-DTD has three continuous groundwater containment wells under FGD and EVAP ponds at the site.
Well ID Materials Entry Riser Screen Exit Riser Total
FGD-1 6” stainless steel 200’ 2,053’ 21’ 2,274’
EVAP-1 4” stainless steel 223’ 1,425’ 352’ 2,000’
EVAP-2 4” stainless steel 285’ 2,394’ 258’ 2,937’
The wells were completed in native formations consisting of sandstone and weathered sandstone materials. Surface casings were set and cemented in place on the entry side.
The wells were drilled “uphill” under evaporation and flue gas desulfurization (FGD) ponds and gravity flowed after construction and development. Drilling was completed using biodegradable drilling fluids, and well development consisted of washing, jetting, and pumping with a submersible pump.
